EP0443361A1 - Flusenfilterüberwachungsvorrichtung für Trockner - Google Patents

Flusenfilterüberwachungsvorrichtung für Trockner Download PDF

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Publication number
EP0443361A1
EP0443361A1 EP91101536A EP91101536A EP0443361A1 EP 0443361 A1 EP0443361 A1 EP 0443361A1 EP 91101536 A EP91101536 A EP 91101536A EP 91101536 A EP91101536 A EP 91101536A EP 0443361 A1 EP0443361 A1 EP 0443361A1
Authority
EP
European Patent Office
Prior art keywords
filter
door
closed
monitoring device
lug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91101536A
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English (en)
French (fr)
Inventor
Graziello Grandin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industrie Zanussi SpA
Original Assignee
Industrie Zanussi SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Publication of EP0443361A1 publication Critical patent/EP0443361A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/22—Lint collecting arrangements

Definitions

  • the invention relates to a fluff filter monitoring device for laundry driers, of a simple construction permitting the presence or absence of the fluff filter in its seat as well as the condition of the filter with regard to its being clogged with fluff to be indicated.
  • Modern laundry driers comprise a rotating drum for containing the moist laundry to be dried, a drying air circulation conduit having installed therein at least one blower and an electric heater element operable to produce a hot air flow and to direct it through the laundry to be progressively dried thereby, and a fluff filter acting to retain any fluff released by the laundry for preventing it to enter the conduit.
  • suitable monitoring means acting to monitor its proper operation and to indicate to the user, by means of suitable optic or acoustic signals, when the filter is completely clogged with fluff and should therefore be cleaned or replaced, to thereby prevent the laundry from becoming overheated or even burnt due to the insufficient circulation of the hot air, so that the satisfactory and reliable operation of the machine is always ensured.
  • a laundry drier 8 of a conventional type comprising a metal casing 9 enclosing a rotatable drum 10 for containing the moist laundry to be dried, and accessible through an opening 12 formed in the casing in alignment with the drum and adapted to be closed by a front door 11, and a drying air circulation conduit 13 connected to drum 10 and including at least one blower 14 and an electric heater element 15 operable to produce a hot air flow circulating through drum 10 and conduit 13.
  • the laundry drier further comprises a filter 16 for retaining the fluff entrained from the laundry by the hot air flow, and for thus preventing it from being recirculated through conduit 13, to thereby ensure satisfactory operation of the machine.
  • filter 16 is advantageously housed in a vertically extending seat 17 located on the front face of casing 9 adjacent front opening 12 in communication with air circulation conduit 13.
  • the upper end face 18 of filter 16 is formed as a circular arc capable of adapting itself to the peripheral rim 19 of opening 12 when filter 16 is fully inserted into seat 17.
  • the circular peripheral frame 20 of door 11 is hinged to the casing of the machine adjacent one side, for instance the left side as illustrated in fig. 1, of front opening 12, and is further provided with a hook (not visible in fig.1) adapted to engage a complementary catch in a cutout 21 formed in casing 9 on the diametrally opposite side of front opening 12.
  • Peripheral frame 20 is additionally provided with two projecting lugs 22 and 23 disposed diametrally opposite one another on a line perpendicular to the plane of the hinge and the catch of the door, and adapted to be received in respective cutouts 24 and 25 formed just above and below front opening 12.
  • a microswitch Disposed adjacent upper cutout 24 in an internal cavity (not shown) of the front wall of casing 9 is a microswitch (not shown) connected to the electric circuit of the machine and adapted to be closed and opened, respectively, by upper lug 22, as door 11 is being closed and opened, to thereby determine the energization and deenergization, respectively, of the machine.
  • the lower lug 23 on its part is adapted to enter, or prevented from entering, the associated cutout 25 to thereby respectively permitting door 11 to be, or preventing it from being, closed, depending on the actual position of a planar gate member 26 carried by a flexible plastic strip 27 having its other end secured by per se known means (eg. screws 28) to a carrier frame 29 provided in seat 17 for filter 16.
  • flexible plastic strip 27 is mounted in a position causing it to interact with filter 16 as it is inserted into or removed from its seat 17.
  • filter 16 When filter 16 is being inserted, it slides on planar gate member 26 and along the rearwards bent portion 30 of flexible strip 27, causing it to be forced towards carrier frame 29, as a result of which gate member 26 is displaced to a position away from cutout 25 to thereby permit lower lug 23 to be received therein, and thus door 11 to be closed. In this case upper lug 22 of door 11 enters the corresponding cutout 24 so as to close the above-described microswitch, permitting the laundry drier to be put into operation.
  • filter 16 When on the other hand filter 16 is removed from its seat for replacement or for being cleaned of fluff retained thereon (cf.
  • the present monitoring device permits the presence or absence of filter 16 in its seat to be readily and reliably detected, at the same time permitting the machine to be, or preventing it from being, put into operation in response to the actuation of the microswitch, which can only be closed when the presence of filter 16 in its seat permits door 11 to be closed.
  • Closure member 31 includes a planar wall portion 33 having dimensions slightly greater than the cross-sectional area of circulation conduit 13, and a planar gate portion 34 of a shorter length than and disposed perpendicular to wall portion 33 at a position resulting in its being positioned opposite and closely adjacent lower cutout 25, when a torsion spring 35 mounted on pin 32 and having its free ends supported on an inner wall surface 38 of seat 17 and the opposite surface of planar wall portion 33 causes closure member 31, in response to removal of filter 16 from seat 17, to assume a position in which it closes conduit 13 (cf.
  • the present monitoring device finally performs the additional function of monitoring the degree of clogging of the filter by the retained fluff.
  • the device additionally comprises an electronic circuit diagrammatically indicated by a block 39 to be described in detail below, and adapted to detect the presence or absence of the filter in its seat as well as the degree to which the filter is clogged by fluff retained thereon, by applying the principle of generating (at a point B) a light beam directed onto a reflector or mirror C located on the opposite side of filter 16, and receiving (at a point D) the light beam reflected by the mirror.
  • the light beam has to pass twice through the filter 16 as it is directed onto the mirror at C and reflected back to point D, it is possible to indirectly determine whether the filter is in place and to what degree it is clogged by fluff.
  • This circuit for monitoring the degree of clogging of the filter substantially comprises a power supply stage 40 connected to the electric mains 41 through the microswitch 42 of the machine when closed by the lug 22 of the door 11 of the machine in the manner described above, and adapted to transform the alternating mains current into a DC voltage to be applied to the electronic circuit components to be described, microswitch 42 being also effective to energize the various electric functional components of the machine (motor, resistance heater etc.) diagrammatically indicated by a block 43, via a pair of main conductors 44 and 45 and an electric switch 46 operable in the manner to be described.
  • power subbly stage 40 is operatively connected to a current stabilizing and regulating stage 47 having three output terminals 48, 49, 50 connected respectively to a light-emitting diode 51 or a similar component, a photodiode 52 or a similar component, and a voltage divider preferably composed of three series-connected resistors 53, 54 and 55 the function of which will be explained in the following, all of the named components being connected to power supply stage 40 via a common conductor 56 having a branch connection to ground 57.
  • Diodes 51 and 52 serve the purpose respectively of generating the light beam (at point B) to be directed through the filter and of receiving (at point D) the light beam reflected by the mirror at C on the other side of the filter 16.
  • the present monitoring circuit additionally comprises two electronic comparators 58 and 59 of conventional type, of which comparator 58 is provided with two input terminals 60 and 61 connected respectively to output terminal 49 of current stabilizing and regulating stage 47 and to a connection point 62 between resistors 53 and 54, the output terminal 63 of comparator 58 being connected to an electromechanical actuator 64 (a relay or the like) mechanically coupled to electric switch 46 for the opening and closing actuation thereof, actuator 64 being also electrically connected to common conductor 56.
  • electromechanical actuator 64 a relay or the like
  • Comparator 58 serves the purpose of comparing the output voltage generated by photodiode 52 in proportion to the intensity of the reflected light beam impinging thereon, to a preselected reference voltage generated by the two resistors 53 and 54, the level of this reference value being adjusted so as to correspond to the completely fluff-clogged state of the filter, the result of this comparison being used to control the opening or closing operation of electric switch 46 by means of the electromechanical actuator 64.
  • the filter As long as the filter is completely unobstructed or only partially obstructed by fluff retained thereon, and thereby permits an efficient circulation of the hot air flow through the conduit 13 of the laundry drier, the light beam reflected by the mirror C and received by photodiode 52 is of sufficient intensity for the generation of an electric voltage at a level above that of the reference voltage, as a result of which the output 63 of comparator 58 is maintained at the logic level "0". Under this condition, actuator 64 maintains switch 46 closed, so that the laundry drier is energized.
  • Comparator 59 on its part has a first and a second input terminal 65 and 66 connected respectively to the output terminal 49 of current stabilizing and regulating stage 47, and to a connection point 67 between resistors 54 and 55, and an output terminal 68 connected to common conductor 56 via a light signalling component such as a light-emitting diode 69 or the like.
  • Comparator 59 serves the purpose of comparing the electric voltage generated by photodiode 52 in proportion to the intensity of the light beam reflected by the mirror at C and impinging thereon, to a preselected reference voltage generated by resistors 54 and 55 and adjusted so as to correspond to the completely fluff-clogged state of the filter, and to control through its output 68 the energization of the light signalling component 69 when the filter attains the completely clogged state. Under this condition, and as in the case explained previously, the output 68 of comparator 59 is switched from the initial logic level "0" maintaining light-signalling component 69 in the deenergized state, to the logic level "1" causing the signalling component 69 to light up to indicate the clogged state of the filter.
  • the present monitoring device is thus capable in a simple and efficient manner of performing the double function of monitoring the presence or absence of the fluff filter in its seat, and of monitoring the operative state of the filter, so that it can be cleaned or replaced in case of its being clogged, a specific advantage of the present device being that it permits the laundry drying cycles to be executed in a regular manner only when the filter is properly in place.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP91101536A 1990-02-20 1991-02-05 Flusenfilterüberwachungsvorrichtung für Trockner Withdrawn EP0443361A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT45708A IT1239182B (it) 1990-02-20 1990-02-20 Dispositivo di controllo del filtro delle filacce per macchine asciugabiancheria
IT4570890 1990-02-20

Publications (1)

Publication Number Publication Date
EP0443361A1 true EP0443361A1 (de) 1991-08-28

Family

ID=11257464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101536A Withdrawn EP0443361A1 (de) 1990-02-20 1991-02-05 Flusenfilterüberwachungsvorrichtung für Trockner

Country Status (2)

Country Link
EP (1) EP0443361A1 (de)
IT (1) IT1239182B (de)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29618169U1 (de) * 1996-10-19 1998-02-19 AEG Hausgeräte GmbH, 90429 Nürnberg Flusenfilter-Einrichtung für einen elektrischen Wäschetrockner
GB2346969A (en) * 1999-02-19 2000-08-23 Zangenstein Elektro Device for monitoring a dust screen
CN101818439A (zh) * 2009-07-30 2010-09-01 南京乐金熊猫电器有限公司 洗涤装置
WO2011014018A3 (en) * 2009-07-30 2011-06-23 Lg Electronics Inc. Washing machine
EP2365122A1 (de) 2010-03-11 2011-09-14 Electrolux Home Products Corporation N.V. Wäschetrockner mit Vorrichtung zur Flusensiebsichtbarmachung
US20120090189A1 (en) * 2009-05-28 2012-04-19 Kwon Ig Geun Laundry machine having a drying function
EP2664706A1 (de) * 2012-05-14 2013-11-20 Miele & Cie. KG Wäschetrockner
WO2013178517A1 (de) 2012-05-30 2013-12-05 BSH Bosch und Siemens Hausgeräte GmbH Aufnahmevorrichtung für einen entnehmbaren filter eines haushaltsgeräts
EP2787116A1 (de) 2013-04-03 2014-10-08 Electrolux Appliances Aktiebolag Wäschetrockner
DE102013208438A1 (de) 2013-05-08 2014-11-13 BSH Bosch und Siemens Hausgeräte GmbH Überwachungsvorrichtung für eine Haushaltsmaschine
DE102013110931A1 (de) * 2013-10-02 2015-04-02 Miele & Cie. Kg Beutel
US9051679B2 (en) 2009-05-28 2015-06-09 Lg Electronics Inc. Laundry machine
US9103063B2 (en) 2009-05-28 2015-08-11 Lg Electronics Inc. Laundry machine with suspension assembly
EP2202349A3 (de) * 2008-12-22 2015-12-02 BSH Hausgeräte GmbH Wäschetrocknungsgerät und Verfahren zum Reinigen eines Siebs
DE102014211304A1 (de) 2014-06-13 2015-12-17 BSH Hausgeräte GmbH Filtervorrichtung für eine Wäschebehandlungsmaschine und Wäschebehandlungsmaschine mit einer solchen
US9284677B2 (en) 2009-05-28 2016-03-15 Lg Electronics Inc. Laundry machine
CN105473780A (zh) * 2013-08-23 2016-04-06 Bsh家用电器有限公司 包括接收装置的衣物处理器具
US9447534B2 (en) 2008-12-30 2016-09-20 Lg Electronics Inc. Laundry machine
CN106012456A (zh) * 2016-07-22 2016-10-12 无锡小天鹅股份有限公司 衣物处理装置
US9758920B2 (en) 2012-01-11 2017-09-12 Lg Electronics Inc. Clothes treating apparatus with detecting device for insertion of filter
US9828715B2 (en) 2009-05-28 2017-11-28 Lg Electronics Inc. Laundry maching having a drying function
CN107916550A (zh) * 2016-10-11 2018-04-17 青岛海尔洗衣机有限公司 一种带有挡板的干衣机
CN114606709A (zh) * 2022-03-08 2022-06-10 长虹美菱股份有限公司 一种干衣机滤网脏堵检测方法及装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579851A (en) * 1969-05-19 1971-05-25 Westinghouse Electric Corp Pop-out lint trap and door interlock for laundry apparatus
DE2715960A1 (de) * 1977-04-09 1978-10-12 Miele & Cie Waeschetrockner mit luftumwaelzung und einem flusensieb
EP0250789A1 (de) * 1986-07-04 1988-01-07 Zanker GmbH Wäschetrockner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579851A (en) * 1969-05-19 1971-05-25 Westinghouse Electric Corp Pop-out lint trap and door interlock for laundry apparatus
DE2715960A1 (de) * 1977-04-09 1978-10-12 Miele & Cie Waeschetrockner mit luftumwaelzung und einem flusensieb
EP0250789A1 (de) * 1986-07-04 1988-01-07 Zanker GmbH Wäschetrockner

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2318408A (en) * 1996-10-19 1998-04-22 Aeg Hausgeraete Gmbh Fluff filter device for an electric laundry drier
GB2318408B (en) * 1996-10-19 2000-08-30 Aeg Hausgeraete Gmbh Lint filter device for an electric laundry drier
DE19745091B4 (de) * 1996-10-19 2004-01-29 AEG Hausgeräte GmbH Flusenfilter-Einrichtung für einen elektrischen Wäschetrockner
DE29618169U1 (de) * 1996-10-19 1998-02-19 AEG Hausgeräte GmbH, 90429 Nürnberg Flusenfilter-Einrichtung für einen elektrischen Wäschetrockner
GB2346969A (en) * 1999-02-19 2000-08-23 Zangenstein Elektro Device for monitoring a dust screen
FR2790402A1 (fr) * 1999-02-19 2000-09-08 Zangenstein Elektro Dispositif pour controler un filtre a peluches
EP2202349A3 (de) * 2008-12-22 2015-12-02 BSH Hausgeräte GmbH Wäschetrocknungsgerät und Verfahren zum Reinigen eines Siebs
US9885143B2 (en) 2008-12-22 2018-02-06 BSH Hausgeräte GmbH Laundry drying device and method for cleaning a filter
US9447534B2 (en) 2008-12-30 2016-09-20 Lg Electronics Inc. Laundry machine
US9422657B2 (en) 2009-05-28 2016-08-23 Lg Electronics Inc. Washing machine
US9828715B2 (en) 2009-05-28 2017-11-28 Lg Electronics Inc. Laundry maching having a drying function
US9284677B2 (en) 2009-05-28 2016-03-15 Lg Electronics Inc. Laundry machine
US9255353B2 (en) 2009-05-28 2016-02-09 Lg Electronics Inc. Laundry machine having a drying function
US20120090189A1 (en) * 2009-05-28 2012-04-19 Kwon Ig Geun Laundry machine having a drying function
US9200838B2 (en) 2009-05-28 2015-12-01 Lg Electronics Inc. Laundry machine having a drying function
US9200837B2 (en) 2009-05-28 2015-12-01 Lg Electronics, Inc. Laundry machine having a drying function
US9194073B2 (en) 2009-05-28 2015-11-24 Lg Electronics Inc. Laundry machine having a drying function
US8800165B2 (en) * 2009-05-28 2014-08-12 Lg Electronics Inc. Laundry machine having a drying function
US9103063B2 (en) 2009-05-28 2015-08-11 Lg Electronics Inc. Laundry machine with suspension assembly
US9051679B2 (en) 2009-05-28 2015-06-09 Lg Electronics Inc. Laundry machine
US8733863B2 (en) 2009-07-30 2014-05-27 Lg Electronics Inc. Washing machine
CN101818439A (zh) * 2009-07-30 2010-09-01 南京乐金熊猫电器有限公司 洗涤装置
CN102428225A (zh) * 2009-07-30 2012-04-25 Lg电子株式会社 洗衣机
WO2011014018A3 (en) * 2009-07-30 2011-06-23 Lg Electronics Inc. Washing machine
CN101818439B (zh) * 2009-07-30 2012-11-28 南京乐金熊猫电器有限公司 洗涤装置
CN102428225B (zh) * 2009-07-30 2014-01-29 Lg电子株式会社 洗衣机
EP2365122A1 (de) 2010-03-11 2011-09-14 Electrolux Home Products Corporation N.V. Wäschetrockner mit Vorrichtung zur Flusensiebsichtbarmachung
US9758920B2 (en) 2012-01-11 2017-09-12 Lg Electronics Inc. Clothes treating apparatus with detecting device for insertion of filter
DE102013000446B4 (de) 2012-01-11 2018-12-20 Lg Electronics Inc. Wäschebehandlungsvorrichtung mit Erfassungsvorrichtung für den Filtereinsatz
EP2664706A1 (de) * 2012-05-14 2013-11-20 Miele & Cie. KG Wäschetrockner
WO2013178517A1 (de) 2012-05-30 2013-12-05 BSH Bosch und Siemens Hausgeräte GmbH Aufnahmevorrichtung für einen entnehmbaren filter eines haushaltsgeräts
DE102012209124A1 (de) * 2012-05-30 2013-12-19 BSH Bosch und Siemens Hausgeräte GmbH Aufnahmevorrichtung für einen entnehmbaren Filter eines Haushaltsgeräts
CN105247131A (zh) * 2013-04-03 2016-01-13 伊莱克斯家用电器股份公司 转筒式干燥机
US9567704B2 (en) 2013-04-03 2017-02-14 Electrolux Appliances Aktiebolag Tumble dryer
CN105247131B (zh) * 2013-04-03 2017-02-22 伊莱克斯家用电器股份公司 转筒式干燥机
EP2787116A1 (de) 2013-04-03 2014-10-08 Electrolux Appliances Aktiebolag Wäschetrockner
WO2014161813A1 (en) 2013-04-03 2014-10-09 Electrolux Appliances Aktiebolag Tumble dryer
DE102013208438A1 (de) 2013-05-08 2014-11-13 BSH Bosch und Siemens Hausgeräte GmbH Überwachungsvorrichtung für eine Haushaltsmaschine
WO2014180758A1 (de) 2013-05-08 2014-11-13 BSH Bosch und Siemens Hausgeräte GmbH Überwachungsvorrichtung für eine haushaltsmaschine
CN105473780A (zh) * 2013-08-23 2016-04-06 Bsh家用电器有限公司 包括接收装置的衣物处理器具
CN105473780B (zh) * 2013-08-23 2017-08-04 Bsh家用电器有限公司 包括接收装置的衣物处理器具
US10053813B2 (en) 2013-08-23 2018-08-21 BSH Hausgeräte GmbH Laundry treatment apparatus comprising a receiving device
DE102013110931B4 (de) * 2013-10-02 2016-11-17 Miele & Cie. Kg Beutel
EP2857575A1 (de) 2013-10-02 2015-04-08 Miele & Cie. KG Beutel
DE102013110931A1 (de) * 2013-10-02 2015-04-02 Miele & Cie. Kg Beutel
DE102014211304A1 (de) 2014-06-13 2015-12-17 BSH Hausgeräte GmbH Filtervorrichtung für eine Wäschebehandlungsmaschine und Wäschebehandlungsmaschine mit einer solchen
CN106012456A (zh) * 2016-07-22 2016-10-12 无锡小天鹅股份有限公司 衣物处理装置
CN106012456B (zh) * 2016-07-22 2018-11-06 无锡小天鹅股份有限公司 衣物处理装置
CN107916550A (zh) * 2016-10-11 2018-04-17 青岛海尔洗衣机有限公司 一种带有挡板的干衣机
CN114606709A (zh) * 2022-03-08 2022-06-10 长虹美菱股份有限公司 一种干衣机滤网脏堵检测方法及装置

Also Published As

Publication number Publication date
IT9045708A0 (it) 1990-02-20
IT1239182B (it) 1993-09-28
IT9045708A1 (it) 1991-08-21

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